harmful

word

Definition

Causing or likely to cause damage, injury, or negative effects.

Usage & Nuances

Common in formal, scientific, and medical contexts ("harmful chemicals"). Often used with 'to' ("harmful to health"). Do not confuse with 'dangerous' (immediate threat); 'harmful' can refer to long-term or subtle effects.

Example Sentences

Smoking is harmful to your health.

basic

Some chemicals are harmful if swallowed.

basic

Watching too much TV can be harmful for children.

basic

Are energy drinks really that harmful, or is it just hype?

natural

Even harmful comments online can spread quickly.

natural

It turns out that skipping breakfast isn’t as harmful as people thought.

natural